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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0887 OpenSSL Security Advisory [05 Jun 2014] 6 June 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: OpenSSL Publisher: OpenSSL Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Access Privileged Data -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-3470 CVE-2014-0224 CVE-2014-0221 CVE-2014-0198 CVE-2014-0195 CVE-2014-0076 CVE-2010-5298 Reference: ESB-2014.0886 ESB-2014.0755 ESB-2014.0751 ESB-2014.0750 ESB-2014.0511 ESB-2014.0505 ESB-2014.0492.5 Original Bulletin: http://www.openssl.org/news/secadv_20140605.txt - --------------------------BEGIN INCLUDED TEXT-------------------- OpenSSL Security Advisory [05 Jun 2014] ======================================== SSL/TLS MITM vulnerability (CVE-2014-0224) =========================================== An attacker using a carefully crafted handshake can force the use of weak keying material in OpenSSL SSL/TLS clients and servers. This can be exploited by a Man-in-the-middle (MITM) attack where the attacker can decrypt and modify traffic from the attacked client and server. The attack can only be performed between a vulnerable client *and* server. OpenSSL clients are vulnerable in all versions of OpenSSL. Servers are only known to be vulnerable in OpenSSL 1.0.1 and 1.0.2-beta1. Users of OpenSSL servers earlier than 1.0.1 are advised to upgrade as a precaution. OpenSSL 0.9.8 SSL/TLS users (client and/or server) should upgrade to 0.9.8za. OpenSSL 1.0.0 SSL/TLS users (client and/or server) should upgrade to 1.0.0m. OpenSSL 1.0.1 SSL/TLS users (client and/or server) should upgrade to 1.0.1h. Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and researching this issue. This issue was reported to OpenSSL on 1st May 2014 via JPCERT/CC. The fix was developed by Stephen Henson of the OpenSSL core team partly based on an original patch from KIKUCHI Masashi. DTLS recursion flaw (CVE-2014-0221) ==================================== By sending an invalid DTLS handshake to an OpenSSL DTLS client the code can be made to recurse eventually crashing in a DoS attack. Only applications using OpenSSL as a DTLS client are affected. OpenSSL 0.9.8 DTLS users should upgrade to 0.9.8za OpenSSL 1.0.0 DTLS users should upgrade to 1.0.0m. OpenSSL 1.0.1 DTLS users should upgrade to 1.0.1h. Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue. This issue was reported to OpenSSL on 9th May 2014. The fix was developed by Stephen Henson of the OpenSSL core team. DTLS invalid fragment vulnerability (CVE-2014-0195) ==================================================== A buffer overrun attack can be triggered by sending invalid DTLS fragments to an OpenSSL DTLS client or server. This is potentially exploitable to run arbitrary code on a vulnerable client or server. Only applications using OpenSSL as a DTLS client or server affected. OpenSSL 0.9.8 DTLS users should upgrade to 0.9.8za OpenSSL 1.0.0 DTLS users should upgrade to 1.0.0m. OpenSSL 1.0.1 DTLS users should upgrade to 1.0.1h. Thanks to Jüri Aedla for reporting this issue. This issue was reported to OpenSSL on 23rd April 2014 via HP ZDI. The fix was developed by Stephen Henson of the OpenSSL core team. SSL_MODE_RELEASE_BUFFERS NULL pointer dereference (CVE-2014-0198) ================================================================= A flaw in the do_ssl3_write function can allow remote attackers to cause a denial of service via a NULL pointer dereference. This flaw only affects OpenSSL 1.0.0 and 1.0.1 where SSL_MODE_RELEASE_BUFFERS is enabled, which is not the default and not common. OpenSSL 1.0.0 users should upgrade to 1.0.0m. OpenSSL 1.0.1 users should upgrade to 1.0.1h. This issue was reported in public. The fix was developed by Matt Caswell of the OpenSSL development team. SSL_MODE_RELEASE_BUFFERS session injection or denial of service (CVE-2010-5298) =============================================================================== A race condition in the ssl3_read_bytes function can allow remote attackers to inject data across sessions or cause a denial of service. This flaw only affects multithreaded applications using OpenSSL 1.0.0 and 1.0.1, where SSL_MODE_RELEASE_BUFFERS is enabled, which is not the default and not common. OpenSSL 1.0.0 users should upgrade to 1.0.0m. OpenSSL 1.0.1 users should upgrade to 1.0.1h. This issue was reported in public. Anonymous ECDH denial of service (CVE-2014-3470) ================================================ OpenSSL TLS clients enabling anonymous ECDH ciphersuites are subject to a denial of service attack. OpenSSL 0.9.8 users should upgrade to 0.9.8za OpenSSL 1.0.0 users should upgrade to 1.0.0m. OpenSSL 1.0.1 users should upgrade to 1.0.1h. Thanks to Felix Gröbert and Ivan Fratric at Google for discovering this issue. This issue was reported to OpenSSL on 28th May 2014. The fix was developed by Stephen Henson of the OpenSSL core team. Other issues ============ OpenSSL 1.0.0m and OpenSSL 0.9.8za also contain a fix for CVE-2014-0076: Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" Reported by Yuval Yarom and Naomi Benger. This issue was previously fixed in OpenSSL 1.0.1g. References ========== URL for this Security Advisory: http://www.openssl.org/news/secadv_20140605.txt Note: the online version of the advisory may be updated with additional details over time. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU5EOGBLndAQH1ShLAQIrlw/+L80TW724kcOTFVvwdF/LiIrFgNSsXC8i ZGvh7LAOsoV4THsMY9BnfoQatQi4AVWgv2zEdoHwqRiCDiDdsF6ccwb+b1qnYHXg 8Qniam3+/kEQFEGSdss4gVts+Y/IOK9W+BjjeYK5MeufapW1OjAzT4vvCyJo2P6F Q6tlPEK6E5O09TXz1VUVgGwXZvSnrPQfqHo+ldWb8HkXwrvYd17fW1WpkkQBYD3I xTit/JXCEciZOPLmqkM5GH8nd7uTC5bTkevx7NVeu2uqhxitvkvR/AsFeZ/4TnUt rXg2K+LCphqE+fmsHz00RfvS+JD7Oe66Q1GgR5fkWSB0VD9/twNK9yoqX21sDyjF BHNfe5hZI8CqcFTHraUS0cEhPyh4YCy5HzafDaZV3vZrdK+06Iq/UdVaUSI0j5Jl IzXSX1zyHbCgauGcyvk3esS2FN7YjhGYc+Y3rusjemzK42xlCcfOqDtNDX54Cc9M j+u8Ot+TpcCElJ981YSyr6oyR68qfK4zWxo1aTeP7916kmpDw59MW4NHZJB6MEJB gVDX/UDG8/ihsx6V8+6XMWpKHbHefqcFcOwVzL/yUiNbvt+hC82uEe6K/G3PZkhZ 7+A5qrV0yIoW7JsUARAuHx979xPeVCjNNSmPR6IiqcFgSZLX/aAGRfT6Xq+sXCHW WwL1rhTjGXs= =zoq6 -----END PGP SIGNATURE-----